com.singularsys.extensions.polynomials

Class POperator

java.lang.Object

com.singularsys.extensions.polynomials.AbstractPNode

com.singularsys.extensions.polynomials.POperator

All Implemented Interfaces:

PNodeI, java.lang.Comparable<PNodeI>

public class POperator
extends AbstractPNode

Represents an operator.

Author:

Rich Morris Created on 16-Dec-2004

Field Summary

Fields inherited from class com.singularsys.extensions.polynomials.AbstractPNode

pc

Constructor Summary

Constructors

Constructor and Description
POperator(PolynomialCreator pc, Operator op, PNodeI[] args)

Method Summary

Modifier and Type	Method and Description
int	compareTo(POperator fun)
void	convertToPolyArray(java.lang.String var, java.util.Map<java.lang.Integer,PNodeI> polyArray) Internal method for extracting coefficients
boolean	equalsPNode(PNodeI node) True is nodes represent the same parse trees
PNodeI	expand() complete expansion. (1+x)^2 --> 1+2*x+x^2
PNodeI	getArg(int i)
java.lang.String	getName()
int	getNArgs()
Operator	getOp()
PostfixMathCommandI	getPfmc()
PNodeI	negate() negates node i.e.
Node	toCompactNode() Converts to a more efficient Jep representation.
Node	toNode() Converts the node to standard Jep format.
java.lang.String	toString() Produces a string representation of the argument.

Methods inherited from class com.singularsys.extensions.polynomials.AbstractPNode

add, compareTo, div, invert, isOne, isZero, mul, pow, sub

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.singularsys.extensions.polynomials.PNodeI

equals

Constructor Detail

POperator

public POperator(PolynomialCreator pc,
                 Operator op,
                 PNodeI[] args)

Method Detail

equalsPNode

public boolean equalsPNode(PNodeI node)

Description copied from interface: PNodeI

True is nodes represent the same parse trees

Specified by:

equalsPNode in interface PNodeI

Overrides:

equalsPNode in class AbstractPNode

compareTo

public int compareTo(POperator fun)

toString

public java.lang.String toString()

Description copied from interface: PNodeI

Produces a string representation of the argument.

Specified by:

toString in interface PNodeI

Overrides:

toString in class java.lang.Object

toNode

public Node toNode()
            throws ParseException

Description copied from interface: PNodeI

Converts the node to standard Jep format.

Throws:

ParseException

toCompactNode

public Node toCompactNode()
                   throws ParseException

Description copied from interface: PNodeI

Converts to a more efficient Jep representation. Exploits the feature of the Add and Multiply operators which allow the operators to work as n-ary operators. Order of elements is altered to make for more efficient operation.

Returns:

Throws:

ParseException

expand

public PNodeI expand()
              throws ParseException

Description copied from interface: PNodeI

complete expansion. (1+x)^2 --> 1+2*x+x^2

Throws:

ParseException

getName

public java.lang.String getName()

Returns:

Returns the name of the operator.

getPfmc

public PostfixMathCommandI getPfmc()

Returns:

Returns the PostfixMathCommandI for the operator.

getNArgs

public int getNArgs()

Returns:

the number of arguments

getArg

public PNodeI getArg(int i)

Parameters:

i -

Returns:

returns the i-th argument

getOp

public Operator getOp()

Returns:

Returns the operator.

convertToPolyArray

public void convertToPolyArray(java.lang.String var,
                               java.util.Map<java.lang.Integer,PNodeI> polyArray)
                        throws ParseException

Description copied from interface: PNodeI

Internal method for extracting coefficients

Parameters:

var - variable name

polyArray - results added to this map

Throws:

ParseException

negate

public PNodeI negate()
              throws ParseException

Description copied from interface: PNodeI

negates node i.e. -x

Throws:

ParseException